Improvement in let-off mechanism for looms



@Halimi /taten RENSSELAER REYNOLDS, OF STOOKPORT, NEW YORK.

Letters Paten't'No. 88,906, lated Apfrt'l 13, 1869.

IMPROVEMENT IN' LET-OFF MECHANISM FOR LOOMS.

The Schedule referred to in these Letters Patent and making part of the same.

To all whom lt may concern:

Be it known that I, RnNssELAER REYNOLDS, of Stockport, inthe county of Columbia, and State of New York, have invented a new and useful Improvement in Looms; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 represents a side elevation of a loom-frame, with my improve'ments applied thereto, with a part broken out of the frame;

Figure 2 represents a plan view, with parts removed;

.and

Figure 3 represents a sectional elevation, taken on the line x x of g. 2.

Similar letters of reference indicate like parts.

This invention relates to improvements in the leto motionfor looms, patented to me on the 21st day of May, 1861, and also to an improved method of relieving the warp when the stop-motion fails to protect, as it sometimes occurs.

It consists in arranging the yarn-beam for winding the yarn on again, in case too much is let olf; also, an arrangement for throwing down the whip-roll, to relieve the warp, by the tension of the same, when it becomes induly increased by the failure of the shuttle to box; and also in certain improvements in the arrangement of the let-oli` mechanism.

A represents the whip-roll, and

B, the yarn-beam..

On the latter, a worm-wheel, C, is arranged.

D is a worm,l secured to a worm-shaft, D', arranged in the vibrating frame E, and having a friction-wheel, F, on its inner end, working in connection with the friction-disk G'on .the cam-shaft H.

I represents an arm, secured to the whip-roll, provided with the adjustable curved arm I, which takes, at its outer curved end behind, a friction-roll, I, working on the upper end of the arm I3, adjustablyconnected to the weighted bell-crank I4, pivoted to the loom-frame at I5, and bearing, at the lower extremity, against the arm K of the vibrating support E of the worm-shaft, in such a manner as to'have a constant tendency to separate the friction-wheel F from the disk G.

The operation of the mechanism thus far described is similar to that described in the aforesaid patent, granted to me, but the arrangement differs in the substitution of a weight for a spring, to bear the frictionwheel F away from the disk Gr, and the arrangement of the arms, or leversconnecting the whip-roll with the vibrating frame E.

When the tension of the warp is sufficient to oscillate the whip-roll, the arms I and I, acting on the arm I3 and bell crank, will raise the latter, so that the spring L, connected to the said bell-crank, and bearing against the arm K of the vibrating supportof the friction-wheel F, will throw the latter against the disk G, which is constantly in motion, and which will communicate inotion to the wheel F, to unwind the yarn from the beam, until the tension is overcome by the weight on the bell-crank I4, which will throw the friction-wheel out of gear with the disk, and thereby stop the delivery.

In the practical operation of this plan, as previously patented to me, I found, that under different conditions of the web, owing to atmospheric changes and other causes, that an increase or diminutionv of friction occurred between the surfaces of the friction-wheel and the disk, causing the yarn-beam at times to be carried too far, and the web thereby too much slackened.

To remedy this defect, I have introduced a second disk, G', on the cam-shaft, and on the opposite side of the friction-wheel F, against which the latter will lbe carried by the weight when the yarn is vtoo much slackcned, and -be set in motion in the opposite direction, to wind the yarn on again, until the proper tension is attained, when the friction of the 'wheel F and disk G' will be overcome by the tension of the yarn. Under this arrangement, the tension of the warp will be uniniiuenced by the angle at which it is deliveredfrom the beam, as is the case when the beam isset into rotation by the direct action of the warp.

To vary the tension of the warp, for the production of lighter or heavier goods, the arms I1 and I3 have been made adjustable respectively, as described, o n the arm I and the bell-crank I. v

To reduce the tension, the arm I1 may be adjusted to a position nearer the whip-roll, and the arm I3 'correspondingly elevated, which will give to thevwarp an increased leverage against the weight, while, if ad-z justed in the opposite direction, the advantage will be in favor of the weight, and the tension will be greater.

In the arrangement as previously patented to me, the friction-pulley was thrown into action with the disk by the positive action of a lever bearing against the arm K- of the vibrating support of the frictionwheel. This arrangement, I have found to be objectionable, as it; causes a severe blow of the frictionwheel on the disk, and also a sudden strain on the warp when rst set into Amotion; and, to avoid this diiculty, Ihave interposed the spring L, above referred to, for moving the said friction-wheel into action with the disk, the action of which is sufficiently yielding to avoid the aforesaid objections.

To prevent smashesf when the loom fails to protent]7 as before referred to,1 have provided the arrangement of the curved arm 11 and friction-roll Iz in the vertical arm I3, so arranged as to be disconnected by any sudden undue strain on the warp, as will occur if the shuttle does not b ox, and the -throwing-out mechanism fails, by which disconnection the whip-roll will'relicve the warp of tension.

The end of the curved arm 1*,Which takes under and'behind the friction-roll, may be constructed of such a curve as will maintain the connection against the tension of the yarn while the loom is working properly,

but-which will instantly disconnect when any sensible or greater strain occurs. and the Whip-roll may be made of a suiiicient breadth to give the necessary relief to the yarn When brought down to a 'horizontal position.

This arrangement aiords a means of instantaneously forming the connection again after the looin'has been prepa-red to be set in motion, without requiring the operator to go behind the loom to wind on the yarn, as in the pace-rope let-offs, where a considerable amount will be delivered under like conditions.

Other arrangements may be made for accomplishing the Winding on of the yarn again, Without departing from the spirit of my invention; and I do not, therefore, limit my claim to this particular arrangement.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- 1. The let-oi mechanism arranged to wind on the surplus yarn letLoi, and to govern the tension of the Warp by the Winding-on devices, constructed substantially as and for the purpose described.

2. The combination, with the vibrating shaft actuating the yarn-beam, of the disks G and G', or their equivalent, arranged to actuate it alternately in either direction, substantially as and for the purpose set forth.

3. The combination of the curved adjustable arm and friction-roll I with the arm I of the Whip-roll and the arm I3 of the let-off' mechanism, whereby relief is afforded the warp under an undue tension ofthe same, substantially as and for the purpose described.

4. The combination, with the Whip-roll and the oscillating frame E, ofthe arm l', adjustable arms I and I3, and weighted bell-crank I4, substantially as and for the purpose set forth.

5. The combination, with the bell-crank I4 and the arm K, of the oscillating frame E of the spring L, substantially as and for the purpose set forth. y

RENSSELAER REYNOLDS.

Witnesses:

J. E. KENT, J. VAN KUREN. 

